Hmmm, I don't know of any particular sites. One of my favorite trainers is Clinton Anderson. He seems to fit my personality and how I interact with horses the best. However, there are many, many famous (and some not so famous) trainers out there Monty Roberts, Pat Parelli, John Lyons, Chris Cox to name a few. What I like to do is to study many different trainers. Here is the reason why. A) Not everyone knows everything. You can pick up a little (or a lot, depends) from each trainer. B) Not all horses are the same, nor do they react the same. What works for one does not work for all. So, if what one trainer suggests doesn't work, you can try a different method. Good luck!